Notes for owners · Branding and communication
Testimonials and case studies for closing: when to send which, and how to ask
A testimonial settles a doubt, a case study answers a question. This post shows which to send at which point in a sale, how to ask a customer, and why unnamed praise persuades few buyers.
The GullySales team · Updated 17 Oct 2026 · 5 min read
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A buyer asks for references and you send a PDF of glowing lines, none with a name. It goes nowhere. A testimonial and a case study do different jobs. A testimonial settles a doubt: "will they turn up on time?" A case study answers a question: "has anyone with my problem used this?" Send the wrong one at the wrong moment and it fails, however good it is.
Which one answers which doubt?
Match the document to what the buyer is hesitating about.
| Where the buyer is | Their doubt | Send | Why |
|---|---|---|---|
| Just enquired, comparing you with others | "Are they real?" | Two or three named testimonials with town and business type | Quick proof of existence |
| After the first call, before the quotation | "Have they done my kind of work?" | One case study close to their trade | Shows the same problem solved |
| Quotation sent, silence | "Is it worth the price?" | A case study that states what the customer decided and why | Gives the buyer a story to repeat to their partner |
| Ready but nervous about risk | "What if it goes wrong?" | A phone number of a reference customer | Hard to fake, so it carries weight |
| After delivery | "Was I right to choose them?" | Ask for the testimonial now | Their relief is highest |
Notice that the case study sits in the middle of the sale and the testimonial at the ends. Many owners send everything at once in a single PDF, and the buyer may read none of it.
Why does an unnamed testimonial not work?
"Excellent service, highly recommended," signed "A satisfied customer," tells the buyer that you wrote it. A buyer reading it asks who, where and what. The version that persuades has a first name and surname, a business, a town, and one specific thing: "They fitted the shutters in two nights so our shop opened on the Monday." A buyer can check it. If it cannot be checked, it is decoration.
So the rule is blunt: if the customer will not be named, leave it out, and offer a call with them instead.
How do you ask without it feeling like a favour?
Timing and wording decide the answer. Ask when the customer has just said something good, at handover or on payment. Do not email a form weeks later.
Make the request small and specific, and make it easy to say yes to. Something like this, spoken or on WhatsApp:
"I'm glad it worked out for you. Two sentences about what we did and how it went would help other buyers decide. May I use your name and your shop's name? I'll show you exactly how it will look before it goes anywhere."
Then offer to draft it for them in their own words from the conversation, and ask them to change whatever is wrong.
An invented draft: "Mehta Stationers, Thane: They fitted the shutters in two nights, so our shop opened on the Monday as promised. One shutter needed a second visit, and they came without being chased." The second sentence, with its small fault, is what makes the first one believable. A blank screen makes people say "later". A customer who gets three sentences to correct is more likely to fix a word and send it back.
Keep the permission in writing: their reply, the date, and where you may use it. If they want to read the final version, let them. If they change their mind later, remove it.
What goes in a case study?
Not praise. A case study is a short account in four parts: the situation the customer was in, what they considered, what was done, and what happened, in their numbers if they agree to share any. Owners often skip the "what they considered" part, yet buyers find it most useful, because it shows the same doubts they have now. A one-page card is enough:
| Part | One line to write |
|---|---|
| Situation | Who the customer is, in trade and town, and what was going wrong |
| Options weighed | The two or three routes the customer compared |
| What was done | The work, in plain words, and who did it |
| Result | What changed, in the customer's numbers or words, with the date checked |
| Confirmed by | The person, and whether they take calls |
How case studies help businesses generate sales goes further. Never invent a figure, and never round a customer's real result upward.
For example: a waterproofing contractor in Thane
Take an invented contractor in Thane who treats terraces and basements for housing societies. The brochure had three lines of praise signed "Society member". Committees did not believe it, and secretaries kept asking for references the contractor had never collected.
There were two changes. After each job passed its first monsoon, the contractor phoned the secretary and asked for two sentences and permission to use the society's name, offering a draft to correct. Then came a short case study of one terrace job: the problem, the three options the committee had weighed, the choice and the reason. When a new committee asked about price, the case study from a similar building went out. When it asked about risk, the contractor gave the number of a past secretary who had agreed beforehand to take such calls. Of the first five societies asked, only two agreed to be named and take calls, and one of those took three weeks to reply. Two usable references were still more than the brochure had offered. The contractor now keeps the list of names, permissions and dates in one sheet, so a reference is never sent without a yes on file.
When should you not use them?
Do not use a testimonial from a customer whose experience you would not repeat. Drop one that is out of date, too. A buyer who sees praise for a product you no longer sell will doubt everything else. In regulated trades such as health, education or finance, rules differ by state and body and change, so check with your own adviser or the regulator before you publish anything from a client. Do not pay for testimonials. If you reward one in any way, say so where it appears. A discount on the next job counts as a reward.
Asking your first three customers
Pick the three customers most pleased with you recently. Message them today with the request above and a draft to correct. Keep it short: nobody wants homework. Put the three replies, with their dates, in one sheet so you can show a yes if a buyer or a customer ever asks. Referrals from the same customers are a separate ask, covered in how to ask for referrals without making the customer uncomfortable. The sales process hub shows where proof matters at each stage. If you want help collecting it, customer testimonials describes what we do. Or tell us what you need.
